API Water Softener Pillow, Large, 2 OZ

Water Softener Pillow protects tropical fish form hard water by removing Calcium, Magnesium and heavy metals. Our pillow helps stabilize pH while eliminating white crusty deposits from your tank. In addition, our pillow may be recharged and re-used up to 4 times. One large pillow treats freshwater tanks up to 20 gallons..